package springIoc.dao.Impl;

import springIoc.dao.Paper;

/**
 * 纸张实现类
 */
public class TextPaper implements Paper {
    private int charPerLine = 16;//每行字符数
    private int linePerPage = 5;//每页行数
    private String content = "";//纸张中内容
    private int posX = 0;       //当前横向位置，从0到charPerLine-1
    private int posY = 0;       //当前行数，从0到linePerPage-1
    private int posP = 1;       //当前页面
    @Override
    public void putInChar(char c) {
        content += c;
        ++posX;
        //判断是否换行
        if (posX == charPerLine){
            content += Paper.newline;
            posX = 0;
            ++posY;
        }
        //判断是否翻页
        if (posY == linePerPage){
            content += "==第" + posP +"页==";
            content += Paper.newline+Paper.newline;
            posY = 0;
            ++posP;
        }
    }
    //使用set方法注入每行字符数
    public void setCharPerLine(int charPerLine){
        this.charPerLine = charPerLine;
    }
    //使用set方法注入每页行数
    public void setLinePerPage(int linePerPage){
        this.linePerPage = linePerPage;
    }


    @Override
    public String getContent() {
        String ret = this.content;
        //补齐本页空行，并显示页码
        if (!(posX == 0 && posY == 0)){
            int count = linePerPage - posY;
            for (int i = 0;i<count;++i){
                ret += Paper.newline;
            }
            ret += Paper.newline;
        }
        return ret;
    }
}
